#pragma once
#include <iostream>
#include <cstdio>
#include <string>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "comm.hpp"
#define PATH "."
#define FILENAME "fifo"

#define ERR_EXIT(m)         \
    do                      \
    {                       \
        perror(m);          \
        exit(EXIT_FAILURE); \
    } while (0)

class NamedFifo
{
public:
    NamedFifo(const std::string &path, const std::string &name)
        : _path(path), _name(name)
    {
        _fifoname = _path + "/" + _name;
        umask(0);
        int n = mkfifo(_fifoname.c_str(), 0666);
        if (n < 0)
        {
            ERR_EXIT("open");
        }
        else
        {
            std::cout << "mkfifo success" << std::endl;
        }
    }
    ~NamedFifo()
    {
        // 删除管道文件
        int n = unlink(_fifoname.c_str());
        if (n == 0)
        {
            ERR_EXIT(unlink);
        }
        else
        {
            std::cout << "remove fifo failed" << std::endl;
        }
    }

private:
    std::string _path;
    std::string _name;
    std::string _fifoname;
};

class FileOper
{
pubilc: 
    FileOper(const std::string &path, const std::string &name)
        : _path(path), _name(name), _fd(-1)
    {
        _fifoname = _path + "/" + _name;
    }
        void OpenForRead()
        {
            // 打开，write方没有执行open的时候，read方，就要在open内部阻塞
            // 直到有人把管道文件打开，open才会返回
            _fd = open(_fifoname.c_str(), O_RDONLY);
            if (_fd < 0)
            {
                std::cerr << "open fifo error" << std::endl;
                return;
            }
            std::cout << "open fifo success" << std::endl;
        }
        void OpenForWrite()
        {
            _fd = open(_fifoname.c_str(), O_WRONLY);
            if (_fd < 0)
            {
                std::cerr << "open fifo error" << std::endl;
                return;
            }
            std::cout << "open fifo success" << std::endl;
        }
        void Write()
        {
            std::string message;
            int cnt = 1;
            pid_t id = getpid();
            while (true)
            {
                std::cout << "Please Enter#";
                std::getline(std::cin, message);
                message += (",message number：" + std::to_string(cnt++) + ",[" + std::to_string(id) + "]");
                write(_fd, message.c_str(), message.size());
            }
        }
        void Read()
        {
            while (true)
            {
                char buffer[1024];
                int number = read(_fd, buffer, sizeof(buffer) - 1);
                if (number > 0)
                {
                    buffer[number] = 0;
                    std::cout << "client say# " << buffer << std::endl;
                }
                else if (number == 0)
                {
                    std::cout << "client quit! me too!" << std::endl;
                    break;
                }
                else
                {
                    std::cerr << "read error" << std::endl;
                    break;
                }
            }
        }
        void Close()
        {
            if (_fd > 0)
                close(_fd);
        }
    ~FileOper()
    {}
private:
    std::string _path;
    std::string _name;
    std::string _fifoname;
    int _fd;
};